Band-edge superconductivity

Garry Goldstein; Camille Aron; Claudio Chamon

doi:10.1103/PhysRevB.92.020504

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Band-edge superconductivity

Garry Goldstein, Camille Aron, Claudio Chamon

DOI 10.1103/PhysRevB.92.020504 · Physical Review B

T1

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Abstract

We show that superconductivity can arise in semiconductors with a band in the shape of a Mexican hat when the chemical potential is tuned close to the band edge, but not intersecting the band, as long as interactions are sufficiently strong. Hence, this is an example where superconductivity can emerge from a band insulator when interactions exceed a threshold. Semiconductors with simple cubic symmetry point groups and with strong spin-orbit coupling provide an example of a system with such band dispersion.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Li2(Pd1-xPtx)3B Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown